3com S7906E Instruccion De Instalación
1-31
To do…
Use the command…
Remarks
Enter OSPF view
ospf [ process-id | router-id
router-id | vpn-instance
instance-name ]*
router-id | vpn-instance
instance-name ]*
—
Configure ASBR route
summarization
summarization
asbr-summary ip-address { mask
| mask-length } [ tag tag |
not-advertise | cost cost ] *
| mask-length } [ tag tag |
not-advertise | cost cost ] *
Required
The command is available on an
ASBR only.
ASBR only.
Not configured by default.
Configuring OSPF Inbound Route Filtering
z
For details about IP prefix list, refer to Route Policy Configuration in the IP Routing Volume.
z
For details about route policy, refer to Route Policy Configuration in the IP Routing Volume.
Since OSPF is a link state-based interior gateway protocol, routing information is contained in LSAs.
Routes computed by OSPF can be filtered and only permitted routes are installed into the routing table.
There are four filtering methods:
z
Filtering routing information by destination address through ACLs and IP address prefixes.
z
Filtering routing information by next hop through the filtering criteria configured with the gateway
keyword.
z
Filtering routing information by destination address through ACLs and IP address prefixes and by
next hop through the filtering criteria configured with the gateway keyword.
z
Filtering routing information by route policies specified by the route-policy keyword.
Follow these steps to configure inbound route filtering:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enter OSPF view
ospf [ process-id | router-id router-id |
vpn-instance instance-name ] *
vpn-instance instance-name ] *
—
Configure inbound route
filtering
filtering
filter-policy { acl-number [ gateway
ip-prefix-name ] | gateway ip-prefix-name |
ip-prefix ip-prefix-name [ gateway
ip-prefix-name ] | route-policy
route-policy-name } import
ip-prefix-name ] | gateway ip-prefix-name |
ip-prefix ip-prefix-name [ gateway
ip-prefix-name ] | route-policy
route-policy-name } import
Required
Not configured by default.
Configuring ABR Type-3 LSA Filtering
This task is configured on an ABR to filter Type-3 LSAs to be advertised in the attached non-backbone
area and the Type-3 LSAs to be advertised to other areas.